Crustaceyn or Crustacean: How To spell?
The word Crustaceyn is misspelled against Crustacean, meaning "Pertaining to a division of arthropods, containing lobsters, crabs, crawfish, etc."
Crustacean has vowels 'ea' together mispronounced as 'ey'Word contains consecutive vowels 'EA' in between alphabets crustac & n is misspelled as 'EY'
Wrong Spelling:  crustac-ey-n  Correct Spelling:  crustac-ea-n 
Check more misspelled words of Crustacean to spell it correct.